Double-acting sprayer.



No. 808.194. PATENTED DEC. 26, 1905.

P.S.GAROTHBRS.

DOUBLE ACTING SPRAYER. APPLICATION FILED MAR.22.1905.

UNITED STATES PATENT @FFTCE.

DOUBLE-ACTING SPRAYER.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed March 22, 1905. Serial No. 251,487.

To all whom, it may concern:

Be it known that I, FRANK SEBRING CA- ROTHERS, a citizen of theUnitedStates, residing at Jersey Shore, in the county of Lycoming andState of Pennsylvania, have invented new and useful Improvements inDouble- Acting Sprayers, of which the following is a specification.

The object of my invention is the production of a reciprocating sprayerwhich shall deliver liquid at each backward and forward stroke of thepiston and practically supply a continuous spray.

\Vith this end in View my invention consists in certain novelties ofconstruction and combinations of parts hereinafter set forth andclaimed.

The accompanying drawing illustrates an example of the physicalembodiment of the invention constructed according to the best mode Ihave so far devised for the practical application of the principle.

Figure 1 isalongitudinally-vertical section of Fig. 2. Fig. 2 is a topplan view of the device. Fig. 3 is a section of the reservoir, showingan air and a liquid delivery tube. Fig. 4 is a vertical section of thepiston and part of the piston-stem. Fig. 5 is a section of Fig. 4 online a; 0 looking toward the left.

Referring to the several figures, the numeral 1 designates the reservoirfor the liquid to be sprayed, which reservoir may be of any shape ortype; 2, an opening and screw-cap for the introduction of liquid to thereservoir.

3 and 4: are two liquid -delivery tubes or pipes having open endsexterior of the wall of the reservoir and their opposite endsterminating near the bottom of the interior of the reservoir, as shownin Fig. 1; 5, the tube within which air is compressed; 6, the conicalfront end of the tube; 7, a nozzle located at right angles to the pipeor tube 3, as shown; 8, an air-delivery tube located parallel with themain tube; 9, a nozzle arranged at right angles to the end of the tube4, as shown by Fig. 2 of the drawings; 10, an opening at the rear end ofthe tube 5 for the passage of compressed air to the tube 8 upon therearward movement or stroke of the piston; 11, the hollow piston-rod;12, a handle; 13, an orifice adjacent the handle and allowing air topass to the interior of the hollow pistonrod; 1 1, the threaded end ofthe piston-rod; 15, the outer piston, and 16 the inner piston. Each ofthe pistons comprises a disk 17, a disk 18 having a flange 19, and aflanged packing 20, of leather or other suitable flexible materiallocated between the disks. These pistons are arranged parallel and aslight distance apart with spacing-pieces 21 between, whichspacing-pieces in this instance are struck up from the body of one ofthe disks 17, as shown by Fig. 5 of the drawings. Two threaded nuts 2223 are located upon the threaded end of the piston-rod and clamp the twopistons in place, the spacing-pieces maintaining an open space betweenthe two pistons. An opening 2 1 from the hollow piston-rod allowsexternal air to pass by way of the orifice 13 to the space between thepistons. A plug 25 closes the end of the air-compression tube which issecured in position by any suitable means, as by screws. Apacking-leather 26 is seated within a groove in the plug, and saidleather has a flange 27 extending over the end surface of the plug. Acircular recess 28 is provided in the inner end of the plug and astufling or packing 29 inserted, which surrounds the piston-stem and inconnection with a perforated disk 30, fastened by small screws,constitutes a stufling-box and stufling. A disk 31 upon the piston-rodexterior of the plug limits the travel of the piston-rod.

The operation of the sprayer is as follows: Assuming the compound pistonand piston-rod to occupy the positions shown in Fig. 1, the movement ofthe pistons rearwardly compresses the air in the main tube, which passesout through the orifice 10 into the tube 8 and thence to the nozzle 9,where it is discharged across the end of the liquid-delivery tube 4:,which exhausts the air in said tubet and draws up the liquid from thereservoir and sprays it as long as the pressure is maintained in thetube 8, as is obvious. While the piston is moving rearwardly, air passesto the inside of the hollow piston-rod by way of the orifice 13, isdischarged through the opening 2 1 to the space between the two pistons,and thence is delivered to the interior of the front end of thecompression-tube 5 by way of the open space between the inner surface ofthe tube and the external surface of the packing 20, the flanged edge ofthe packing bending inwardly and allowing the air to pass. When thecompound piston is moved from right to left, the operation is identicalwith that described, except that the air compressed within the front endof the compression-tube is discharged through the nozzle 7 and acrossthe end of the liq uid-delivery tube 3. It is obvious that each of thenozzles 7 and 9 and liquid-delivery tubes IIO 3 and 4 may be subdividedinto two or more branches, so as to give a greater quantity of spray.

From the foregoing it is clear that I have produced a reciprocatingsprayer whichin operation will provide a practically continuous deliveryof the liquid in the reservoir and in a finely-divided stateniingleswith the air under compression.

While I have illustrated and described only one example of the physicalembodiment of my invention, I do not intend to restrict my claims tosuch specific example in all its details of construction, inasmuch asthe principle may be embodied in other modes and changes andmodifications be introduced without constituting a substantialdeparture.

What I claim is 1. A double-acting sprayer comprising a reservoir;liquiddelivery tubes; air-delivery nozzles; a compression-tube; asupplemental tube; a compound piston; and a hollow piston-rod for thesupply of external air to the interior of the compression-tube; eachliquiddelivery tube having one end located in the reservoir and theopposite end projecting through the wall of the reservoir; theair-delivery nozzles being in communication with the compression andsupplemental tubes and their open ends located adjacent the open ends ofthe liquid-delivery tubes; the compound piston being located upon theend of the hollow piston-rod; and said hollow piston-rod having a hole13 adjacent the handle and outside the compression-tn be.

2. A double-acting sprayer comprising a reservoir; liquid-deliverytubes; air-delivery nozzles; a compression-tube; a supplemental tube;two pistons with a space between; and a hollow piston-rod communicatingwith the external atmosphere by means of a hole 13 outside thecompression-tube and with the space between the pistons by means of theopening 24:; and each of said pistons being pro vided with means forallowing air to pass alternately to that end of the compression-tubewhich is opposite to the end in which air is being compressed.

3. The combination with asprayer operating substantially as set forth,of, a compression-tube; a supplemental tube; two pistons arranged sideby side and with a space between; spacing-pieces; and a hollowpiston-rod in communication with the external atmosphere and the spacebetween the two pistons; said piston-rod being threaded at the end andhaving thereon nuts 22, 23, between which latter are located the pistonswhich are spaced apart by means of the said spacing-pieces.

4. The combination with a sprayer, constructed substantially as setforth, of a compression-tube; a supplemental tube; two pistons arrangedside by side in parallel planes and separated each from the other toform a space between them, each piston having a flanged packing and theflanges of the two pistons oppositely disposed; and a hollow pistonrodin communication with the external atmosphere and the space between thetwo pistons.

In testimony whereof I aiiix my signature in presence of two witnesses.

FRANK SEEKING CAROTHERS.

Witnesses:

J. J. VVILsoN, J. F. CARoTHERs.

